基于目标反应谱的超高层结构随机地震反应分析  

Random Seismic Response Analysis of Super High-Rise Structure Based on Target Response Spectrum

作　　者：陈清军[1] 陈志海[1] 张振炫[1] 

机构地区：[1]同济大学土木工程防灾国家重点实验室,上海200092

出　　处：《力学季刊》2012年第1期106-112,共7页Chinese Quarterly of Mechanics

基　　金：国家自然科学基金资助项目(50978198);科技部国家重点实验室基础研究资助项目(SLDRCE08-B-03)

摘　　要：目前有关超高层结构的地震反应研究大多限于确定性问题。分别选用上海抗震设计反应谱和软土场地拟合反应谱作为目标反应谱,用迭代方法求取与目标反应谱相对应的功率谱密度函数,按Clough-Penzien平稳随机地震动模型拟合并给出相应谱参数,采用Ansys软件建立上海某超高层建筑结构的三维有限元分析模型,以文中拟合的平稳随机地震动功率谱密度作为输入,对超高层结构进行了随机地震反应分析,探讨了不同类型的随机地震作用下超高层建筑结构地震反应的差异、以及结构的功率谱反应随层高的变化情况,得到了有工程参考价值的结果。At present, due to the lack of long-period ground motion records, the research results on seis- mic response characteristics of high-rise structures under random seismic input get quite few. The Shang- hai earthquake design response spectrum and the fitting long-period response spectrum of soft soil site were chosen as target response spectrum, and the iterating method was used to compute the relative pow- er spectral density functions. Then, the Clough-Penzien model was selected to fit the power spectral den- sity functions, and corresponding spectral parameters were given. Based on this, the Ansys software was used to establish the three-dimensional finite element model of a super high-rise building located in Shang- hai, and the random seismic response of the super high-rise structure was analyzed, the random seismic response characteristic of the super high-rise structure under different power spectral density and the re- sponse variation of floor power spectral density were discussed , and some valuable conclusions for engi- neering were acquired.

关 键 词：超高层建筑结构 随机地震反应分析 不同类型的目标反应谱 平稳激励 数值分析与比较 

分 类 号：P315.9[天文地球—地震学] TU311.3[天文地球—固体地球物理学]